Ane wa Kanojo de Senzoku Maid

A childhood friend and a daughter of a rich and famous guy in protagonist's neighbourhood. One day the management of the company failed and there is a debt. The childhood friend's parents come to ask the protagonist's household to take care of their daughter while they focus on paying back the debt and won't be able to return home for some time. As a result, the childhood friend stays at the protagonist's house and for some reason acts as a maid. But the hard work is directed by a little fun... also...